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dexar [7]
4 years ago
14

What is speed of a particle?

Physics
2 answers:
Galina-37 [17]4 years ago
8 0
The speed of a particle is the instantaneous rate at which its distance of travel
is changing.

Over any finite period of time, its speed is:

               (distance traveled) / (time to travel the distance).

The direction of travel is irrelevant to a description of speed.
Mashutka [201]4 years ago
3 0
SPEED = total DIST. traveled / total time taken
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4 years ago
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A uniform plank of mass 10kg and length 10m rests on two supports, A and B as shown. A boy of weight 500N stands at a distance o
kifflom [539]

Answer:

U² = 142.86 N

U¹ = 357.14 N

Explanation:

Taking summation of the moment about point A, we get the following equilibrium equation: (taking clockwise direction as positive)

W(2\ m) - U^2(7\ m) = 0

where,

W = weight of boy = 500 N

U² = reaction ay B = ?

Therefore,

(500\ N)(2\ m)-(U^2)(7\ m)=0\\U^2=\frac{1000\ Nm}{7\ m}\\

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Now, taking summation of forces on the plank. Taking upward direction as positive, for equilibrium position:

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3 years ago
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